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Title: Observation of quasi-coherent edge fluctuations in Ohmic plasmas on NSTX

Abstract

A quasi-coherent mode with frequency f = 40 kHz is observed in Ohmic plasmas in NSTX with the gas puff imaging diagnostic (GPI). This mode is located predominantly just inside the separatrix, with a maximum fluctuation amplitude similar to that of the broadband turbulence in the same frequency range. The quasi-coherent mode has a poloidal wavelength 16 cm and a poloidal velocity 49 km/s in the electron diamagnetic direction, which are similar to the characteristics expected from a linear drift-wave like mode in the edge.

Authors:
; ORCiD logo ; ORCiD logo
  1. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Publication Date:
DOE Contract Number:  
AC02-09CH11466
Product Type:
Dataset
Research Org.:
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Fusion Energy Sciences (FES)
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Keywords:
Turbulence
OSTI Identifier:
1366985
DOI:
10.11578/1366985

Citation Formats

Banerjee, S., Diallo, A., and Zweben, S.J. Observation of quasi-coherent edge fluctuations in Ohmic plasmas on NSTX. United States: N. p., 2016. Web. doi:10.11578/1366985.
Banerjee, S., Diallo, A., & Zweben, S.J. Observation of quasi-coherent edge fluctuations in Ohmic plasmas on NSTX. United States. doi:10.11578/1366985.
Banerjee, S., Diallo, A., and Zweben, S.J. 2016. "Observation of quasi-coherent edge fluctuations in Ohmic plasmas on NSTX". United States. doi:10.11578/1366985. https://www.osti.gov/servlets/purl/1366985. Pub date:Fri Apr 01 00:00:00 EDT 2016
@article{osti_1366985,
title = {Observation of quasi-coherent edge fluctuations in Ohmic plasmas on NSTX},
author = {Banerjee, S. and Diallo, A. and Zweben, S.J.},
abstractNote = {A quasi-coherent mode with frequency f = 40 kHz is observed in Ohmic plasmas in NSTX with the gas puff imaging diagnostic (GPI). This mode is located predominantly just inside the separatrix, with a maximum fluctuation amplitude similar to that of the broadband turbulence in the same frequency range. The quasi-coherent mode has a poloidal wavelength 16 cm and a poloidal velocity 49 km/s in the electron diamagnetic direction, which are similar to the characteristics expected from a linear drift-wave like mode in the edge.},
doi = {10.11578/1366985},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2016},
month = {4}
}

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Works referenced in this record:

Observation of quasi-coherent edge fluctuations in Ohmic plasmas on National Spherical Torus Experiment
journal, April 2016

  • Banerjee, Santanu; Diallo, A.; Zweben, S. J.
  • Physics of Plasmas, Vol. 23, Issue 4
  • DOI: 10.1063/1.4946871

    Works referencing / citing this record:

    Observation of quasi-coherent edge fluctuations in Ohmic plasmas on National Spherical Torus Experiment
    journal, April 2016

    • Banerjee, Santanu; Diallo, A.; Zweben, S. J.
    • Physics of Plasmas, Vol. 23, Issue 4
    • DOI: 10.1063/1.4946871